from flask import current_app, jsonify
from flask import g
from flask import request
from flask import session

from info import constants
from info.models import User, News, Category
from info.utils.common import user_login_data
from info.utils.response_code import RET
from . import index_blu
from flask import render_template

@index_blu.route('/newslist')
def get_news_list():
    '''
    获取指定分类的新闻列表
    :return:
    '''
# 1.获取参数
    page = request.args.get('p','1')
    per_page = request.args.get('per_page',constants.HOME_PAGE_MAX_NEWS)
    category_id = request.args.get('cid','1')
# 2.检验参数
    try:
        page=int(page)
        per_page = int(per_page)
    except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
# 3.查询数据并分页
    filters = []
#   如果分类id不为1,那么添加分类伪id的过滤
    if category_id != '1':
        filters.append(News.category_id == category_id)
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,per_page,False)
        items = paginate.items
        total_page = paginate.pages
        current_page = paginate.page
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询失败")

    news_li = []
    for news in items:
        news_li.append(news.to_basic_dict())
    return jsonify(errno=RET.OK, errmsg="OK", totalPage=total_page, currentPage=current_page, newsList=news_li,
                   cid=category_id)


@index_blu.route('/')
@user_login_data
def index():
    user = g.user

    # 右侧的新闻排行榜
    news_list = None
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)
    click_news_list = []
    for news in news_list if news_list else [] :
        click_news_list.append(news.to_basic_dict())

    #新闻分类页面
    # (1)获取新闻分类
    categories = Category.query.all()
    # (2)定义列表保存分类
    categories_dicts = []
    for category in categories:
        # 拼接内容
        categories_dicts.append(category.to_dict())

    data = {
        'user_info': user.to_dict() if user else None,
        'click_news_list':click_news_list,
        'categories':categories_dicts,
            }

    return render_template('news/index.html',data = data)

